{"schemaVersion":"jobsearcher.job.v1","id":"4ea72673ebc28f66fc1cd80e","url":"https://jobsearcher.com/jobs/4ea72673ebc28f66fc1cd80e","canonicalUrl":"https://jobsearcher.com/jobs/4ea72673ebc28f66fc1cd80e","title":"Test Engineer","description":"Coreshell's metallurgical Silicon anode technology delivers high capacity, fast-charging, and superior safety. Our low-cost Silicon-dominant batteries have higher energy density, superior intrinsic thermal safety, and significantly lower cost/kWh compared to current LIBs. Coreshell's Si anode material is lower than the cost of graphite and utilizes the largest abundant critical mineral supply in the US and Europe. We strive to transform the global energy and transportation market by enabling cost effective and secure domestic battery supply.\nPosition:\nThis Battery Test Engineer role owns the battery testing infrastructure that underpins Coreshell’s cell development and manufacturing operations. You will be responsible for the installation, commissioning, calibration, and ongoing maintenance of all electrochemical test equipment and will serve as the primary point of contact for hardware vendors. Because this role sits at the critical junction between manufacturing and electrochemical testing, you will also take on key data responsibilities: ensuring that test data is accurately captured, traceable, and structured for downstream analysis by the data science and cell engineering teams. The ideal candidate has hands-on experience managing battery test labs at scale, a meticulous approach to calibration and data integrity, and the ability to keep a growing test infrastructure running reliably in a fast-paced development environment.\n\nCore Responsibilities:\nOwn the installation, commissioning, calibration, maintenance, and continuous improvement of battery test infrastructure, including cyclers, environmental chambers, incubators, and other analytical and electrochemical characterization equipment, ensuring high uptime and reliable operation.\nServe as the primary point of contact for test equipment vendors: managing procurement, service contracts, updates, and technical support.\nDevelop and maintain calibration and preventive maintenance programs for all testing equipment.\nDesign, build, and validate experimental test setups such as instrumented cell fixtures or specialized electrochemical test apparatus.\nDevelop and maintain standardized test protocols for cell formation, characterization, aging, reliability, and qualification, collaborating closely with cell engineers, manufacturing, and data science teams.\nManage test data integrity and traceability by ensuring accurate data capture, metadata tagging, database integration, and alignment between manufacturing records and electrochemical test results.\nLead troubleshooting and root-cause investigations of test hardware, sensors, environmental controls, data acquisition systems, and measurement anomalies to improve test accuracy, reproducibility, and operational efficiency.\nSupport investigations of cell performance and quality variation, identifying and differentiating true cell-related issues from testing, equipment, instrumentation, or data-system anomalies.\nSupport the definition and implementation of data schemas, naming conventions, and quality checks for battery test data, working with the database engineering team to ensure clean, structured, and ML-ready datasets.\nManage the flow of test data from equipment to database systems, ensuring data completeness, proper metadata tagging (cell IDs, batch numbers, manufacturing lot traceability), and timely availability for analysis. Serve as the primary link between manufacturing records and electrochemical test results.\nCollaborate cross-functionally with Cell Development, R&D, Manufacturing, and Quality teams to ensure testing infrastructure and workflows meet evolving development needs.\n\nRequired Experience:\nDemonstrated experience installing, commissioning, and maintaining battery test equipment at scale, including cyclers, thermal chambers, and environmental test equipment.\nHands-on expertise in calibration and metrology for electrochemical test systems, including voltage/current accuracy verification, thermocouple calibration, and environmental chamber qualification.\nExperience designing and building custom test fixtures and setups, including controlled-pressure, controlled-temperature, or instrumented cycling configurations with in-situ sensors for temperature, thickness, or pressure measurement.\nStrong understanding of battery test protocols, including formation, characterization (C-rate testing, HPPC, EIS), cycle life, and calendar aging procedures for lithium-ion cells.\nExperience managing test data pipelines: ensuring proper data capture from cyclers and auxiliary instruments, implementing metadata standards, and maintaining traceability between manufacturing records and test results.\nProficiency with test equipment software and scripting environments for programming complex cycling protocols. Experience with data management tools (SQL, Python, or similar) for test data extraction and quality auditing.\nExperience managing vendor relationships for technical laboratory equipment, including procurement, installation oversight, service level agreements, and technical issue resolution.\nStrong troubleshooting and diagnostic skills: ability to identify and resolve issues in test hardware, sensing, data acquisition, and environmental control systems.\nKnowledge of chemical laboratory and battery testing safety practices, including safe handling and disposal of lithium-ion and lithium-metal cells.\nExcellent organizational skills with the ability to manage multiple testing programs, prioritize channel allocation, and maintain clear documentation in a high-throughput testing environment.\nAbility to excel in highly dynamic, early-stage environments; comfortable with evolving requirements, making progress despite incomplete information, and balancing immediate testing needs with longer-term infrastructure improvements.\nA high degree of professionalism, excellent communication, and presentation skills are essential. Must be comfortable working across experimental, manufacturing, and data science teams.\n\nRequirements:\nA Bachelor’s or Master’s degree in engineering or the physical sciences, with 3+ years of hands-on experience in battery test engineering or a closely related role\nCandidates with an Associate’s degree or technical certification and extensive industry experience in battery test lab operations will also be considered.\n\nLocation & Benefits: San Leandro, CA. Full-time. $80,000-130,000. Salary and equity options dependent on experience. Dental, vision, healthcare and 401(k) benefits are included. Applications will be screened as received.\nCoreshell Technologies is an equal opportunity employer and does not discriminate on the basis of race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, ancestry, age, disability, genetic information, military or veteran status, marital status, or any other protected status under California law.\n\nApplicants requiring reasonable accommodation during the application or interview process should notify the recruiting team.\nz0SGAKrYAs","company":"Coreshell Technologies","rawCompany":"coreshell technologies","city":"San Leandro","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-08-03T18:57:42.884Z","occupations":[{"code":"17-2112.02","title":"Validation Engineers","slug":"validation-engineers"},{"code":"17-2141.01","title":"Fuel Cell Engineers","slug":"fuel-cell-engineers"},{"code":"17-3027.01","title":"Automotive Engineering Technicians","slug":"automotive-engineering-technicians"}],"industries":[{"code":"335910","title":"Battery Manufacturing","slug":"battery-manufacturing"},{"code":"541715","title":"Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)","slug":"research-and-development-in-the-physical-engineering-and-life-sciences-except-nanotechnology-and-biotechnology"},{"code":"541380","title":"Testing Laboratories and Services","slug":"testing-laboratories-and-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Test Engineer","description":"Coreshell's metallurgical Silicon anode technology delivers high capacity, fast-charging, and superior safety. Our low-cost Silicon-dominant batteries have higher energy density, superior intrinsic thermal safety, and significantly lower cost/kWh compared to current LIBs. Coreshell's Si anode material is lower than the cost of graphite and utilizes the largest abundant critical mineral supply in the US and Europe. We strive to transform the global energy and transportation market by enabling cost effective and secure domestic battery supply.\nPosition:\nThis Battery Test Engineer role owns the battery testing infrastructure that underpins Coreshell’s cell development and manufacturing operations. You will be responsible for the installation, commissioning, calibration, and ongoing maintenance of all electrochemical test equipment and will serve as the primary point of contact for hardware vendors. Because this role sits at the critical junction between manufacturing and electrochemical testing, you will also take on key data responsibilities: ensuring that test data is accurately captured, traceable, and structured for downstream analysis by the data science and cell engineering teams. The ideal candidate has hands-on experience managing battery test labs at scale, a meticulous approach to calibration and data integrity, and the ability to keep a growing test infrastructure running reliably in a fast-paced development environment.\n\nCore Responsibilities:\nOwn the installation, commissioning, calibration, maintenance, and continuous improvement of battery test infrastructure, including cyclers, environmental chambers, incubators, and other analytical and electrochemical characterization equipment, ensuring high uptime and reliable operation.\nServe as the primary point of contact for test equipment vendors: managing procurement, service contracts, updates, and technical support.\nDevelop and maintain calibration and preventive maintenance programs for all testing equipment.\nDesign, build, and validate experimental test setups such as instrumented cell fixtures or specialized electrochemical test apparatus.\nDevelop and maintain standardized test protocols for cell formation, characterization, aging, reliability, and qualification, collaborating closely with cell engineers, manufacturing, and data science teams.\nManage test data integrity and traceability by ensuring accurate data capture, metadata tagging, database integration, and alignment between manufacturing records and electrochemical test results.\nLead troubleshooting and root-cause investigations of test hardware, sensors, environmental controls, data acquisition systems, and measurement anomalies to improve test accuracy, reproducibility, and operational efficiency.\nSupport investigations of cell performance and quality variation, identifying and differentiating true cell-related issues from testing, equipment, instrumentation, or data-system anomalies.\nSupport the definition and implementation of data schemas, naming conventions, and quality checks for battery test data, working with the database engineering team to ensure clean, structured, and ML-ready datasets.\nManage the flow of test data from equipment to database systems, ensuring data completeness, proper metadata tagging (cell IDs, batch numbers, manufacturing lot traceability), and timely availability for analysis. Serve as the primary link between manufacturing records and electrochemical test results.\nCollaborate cross-functionally with Cell Development, R&D, Manufacturing, and Quality teams to ensure testing infrastructure and workflows meet evolving development needs.\n\nRequired Experience:\nDemonstrated experience installing, commissioning, and maintaining battery test equipment at scale, including cyclers, thermal chambers, and environmental test equipment.\nHands-on expertise in calibration and metrology for electrochemical test systems, including voltage/current accuracy verification, thermocouple calibration, and environmental chamber qualification.\nExperience designing and building custom test fixtures and setups, including controlled-pressure, controlled-temperature, or instrumented cycling configurations with in-situ sensors for temperature, thickness, or pressure measurement.\nStrong understanding of battery test protocols, including formation, characterization (C-rate testing, HPPC, EIS), cycle life, and calendar aging procedures for lithium-ion cells.\nExperience managing test data pipelines: ensuring proper data capture from cyclers and auxiliary instruments, implementing metadata standards, and maintaining traceability between manufacturing records and test results.\nProficiency with test equipment software and scripting environments for programming complex cycling protocols. Experience with data management tools (SQL, Python, or similar) for test data extraction and quality auditing.\nExperience managing vendor relationships for technical laboratory equipment, including procurement, installation oversight, service level agreements, and technical issue resolution.\nStrong troubleshooting and diagnostic skills: ability to identify and resolve issues in test hardware, sensing, data acquisition, and environmental control systems.\nKnowledge of chemical laboratory and battery testing safety practices, including safe handling and disposal of lithium-ion and lithium-metal cells.\nExcellent organizational skills with the ability to manage multiple testing programs, prioritize channel allocation, and maintain clear documentation in a high-throughput testing environment.\nAbility to excel in highly dynamic, early-stage environments; comfortable with evolving requirements, making progress despite incomplete information, and balancing immediate testing needs with longer-term infrastructure improvements.\nA high degree of professionalism, excellent communication, and presentation skills are essential. Must be comfortable working across experimental, manufacturing, and data science teams.\n\nRequirements:\nA Bachelor’s or Master’s degree in engineering or the physical sciences, with 3+ years of hands-on experience in battery test engineering or a closely related role\nCandidates with an Associate’s degree or technical certification and extensive industry experience in battery test lab operations will also be considered.\n\nLocation & Benefits: San Leandro, CA. Full-time. $80,000-130,000. Salary and equity options dependent on experience. Dental, vision, healthcare and 401(k) benefits are included. Applications will be screened as received.\nCoreshell Technologies is an equal opportunity employer and does not discriminate on the basis of race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, ancestry, age, disability, genetic information, military or veteran status, marital status, or any other protected status under California law.\n\nApplicants requiring reasonable accommodation during the application or interview process should notify the recruiting team.\nz0SGAKrYAs","datePosted":"2026-08-03T18:57:42.884Z","dateModified":"2026-08-03T18:57:42.884Z","hiringOrganization":{"@type":"Organization","name":"Coreshell Technologies","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"San Leandro","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"4ea72673ebc28f66fc1cd80e"},"url":"https://jobsearcher.com/jobs/4ea72673ebc28f66fc1cd80e"}}